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https://issues.apache.org/jira/browse/SPARK-2384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14053834#comment-14053834
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Sandy Ryza commented on SPARK-2384:
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This is a great idea
> Add tooltips for shuffle write and scheduler delay in UI
> --------------------------------------------------------
>
> Key: SPARK-2384
> URL: https://issues.apache.org/jira/browse/SPARK-2384
> Project: Spark
> Issue Type: Improvement
> Components: Web UI
> Reporter: Kay Ousterhout
> Assignee: Kay Ousterhout
> Priority: Minor
>
> There are a few common points of confusion in the UI that could be clarified
> with tooltips. We should add tooltips to explain the scheduler delay and the
> shuffle data (to explain why shuffle read is typically < shuffle write, as
> many many people have expressed confusion about).
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